Classification
S - Agriculture
199
Q - Science
169
T - Technology
107
R - Medicine
63
H - Social Science
54
M - Music
32
L - Education
22
G - Geography, Anthropology, Recreation
18
A - General Works
15
N - Fine Arts
11
B - Philosophy, Psychology, Religion
8
P - Language and Literature
7
Z - Library Science
7
D - World History
6
U - Military Science
3
F - General American History
2
C - Historical Sciences
1
E - United States History
1
J - Political Science
1